問題詳情：
In recent years,sandstorms___41___(occur) in China frequently,especially in northwestern areas,___42___severe influence has caused wide concern in China.
There're several reasons for t of all,people are cutting down trees without planting more,___43___(make) some land become her reason is___44___it rains less due to the environment pollution.
To___45___(efficient) prevent sandstorms,first,we should plant more trees and grass which can keep the soil ___46___ being washed nd,more green fences should___47___(build) along the desert,___48___it helps to control the process of the desertification.
Let's take action to do what we can___49___(prevent) sandstorms from the golden days we have been looking forward to___50___(come).
【回答】
41. have occurred
42. whose 43. making
44. that 45. efficiently
46. from 47. be built
48. and 49. to prevent
50. will come
知識點：語法填空
題型：未分類
